Spray nozzle



Patented Oct. 15, 1935 UNITED STATES ATEN'r .OFFICE 4 Claims.

This invention relates to improvements in spray nozzles and particularlyto nozzles that are adapted to be used in multiple on a common supplypipe.

One object of the invention is to provide a nozzle wherein maximumatomization of the uid will be obtained.

A further object is to provide a nozzle with means for clearing orcleaning the spray orifice which will function automatically when thesupply of spray fluid is cut off.

More specifically, the invention contemplates a nozzle comprising a xedfluid supply pipe with a nozzle barrel slidable thereon, the uid fromsaid pipe passing through a chamber in the interior of the barrel andthrough one or more passages in a disk on said pipe before issuing fromthe spray orifice of the nozzle. A spring interposed between the diskand a shoulder on the interior of the barrel tends to move the barrel onthe pipe so as to project a clearing or cleaning pin on the disk throughsaid spray orifice. The pressure of the spring, however, is less thanthe pressure under which the fluid is supplied, so that the latter willcause the pin to be retracted from the orifice when the nozzle is inuse, but upon the supply being cut off the spring will again cause thepin to move into the orifice.

The passages in said disk are so disposed as to impart a whirling motionto the fluid passing therethrough. In addition, the spring abovementioned is in the form of a coil spring located in said chamberthrough which the fluid ows from the pipe to the whirling passages. As aconsequence, the convolutions of the spring impart a preliminarywhirling motion to the iluid so that, by the conjoint action of thespring and said passages maximum atomization of the fluid is obtained.

With these and other objects in View, the invention consists in certaindetails of construction and combinations and arrangements of parts, allas will hereinafter be more fully described and the novel featuresthereof particularly pointed out in the appended claims.

In the accompanying drawing,-

Figure 1 is a sectional view taken longitudinally of the present nozzle,the clearing pin being shown positioned in the spray orifice under theinuence of the spring.

Fig. 2 is a similar view showing the pin retracted, this being theposition it occupies under the inuence of uid owing through the nozzle;

Fig. 3 is a transverse section on the line 3-3 of Fig. 1; and

Fig. 4 is a perspective View of the fluid conduit y and whirler disk.

As at present mentioned, the present nozzle is specially designed foruse in apparatus wherein a plurality of nozzles are connected to acommon 5 supply pipe. In the present illustration the branch supply pipeI0 is adapted to be connected to the main or common supply pipe (notshown), each nozzle having its individual branch pipe. The pipe I I! issubstantially fixed or stationary and 10 slidable thereon is the nozzlebarrel II, one end of said barrel being provided with suitable packingI2 and the opposite end being open, but provided with a closure cap I3threaded thereon. Said capcomprises a diskglll formed with the 15 sprayoriiice I5. The disk may, if desired, be simply clamped between the capI3 and the end of the barrel.

A supply passage IIIa in pipe I0, terminates in one or more transverseports or outlets Il)b which 20 communicate with an annular chamber I5between the pipe and a portion of the interior surface of the barrel.The extremity of the pipe within the barrel is preferably solid and hasformed thereon an enlarged disk I1 in which 25 there are a plurality ofspiral passages I8, pref- Y erably in its periphery. Mounted in saiddisk, in

registry with orifice I5 is a pin I9 and interposed between saiddisk anda shoulder 20 on the interior of barrel Il is a spring 2| which, whenex- 30 panded, will cause the barrel to occupy the position in which itis shown in Fig. 1, i. e., with pin I9 projecting into or throughorifice I5. However, during the ow of fluid through the nozzle, thepressure of the fluid against the cap or cap 35 disk is sucient toovercome and compress said spring and move the barrel to the position inwhich it is shown in Fig. 2, i. e., with pin I9 Withdrawn from theorice. This movement of the barrel is preferably limited by engagementof a shoulder 450 22 on the barrel with the whirler disk II.

With the construction described, it will be apparent that if the sprayorifice should become clogged or closed it is only necessary to cut 01Tthe supply of spraying fluid to relieve the pres- 45 sure thereofagainst the barrel disk I4, whereupon the spring 2l will move the barrelinwardly ofthe pipe I0, so to speak, and project pin I9 through thespray orifice, cleaning or clearing the latter. I

In order to obtain maximum atomization of the spraying fluid, thewhirling action imparted thereto by pass-ages I8 in whirler disk II isaugmented by having spring 2| of coil type and locating it in chamber I6between the outlets 55 10b and said passages I8. By means of thisarrangement, the spiral convolutions of the spring impart a whirlingmotion to the fluid before the latter reaches s-aid passages. As aresult of this preliminary or supplemental action of the spring, thefluid meets with less resistance in flowing through the passages and thecombined action of the spring and passages produces maximum atomization.

What I claim isz- 1. In a spray nozzle, a fluid con-duit having anoutlet in the side thereof and a closed end, a nozzle barrel slidable onsaid conduit, said barrel having a spray orifice in the end thereof, adisk on said conduit, said disk having a plurality of passages thereinfor imparting a whirling motion to fluid passing therethrough, a portionof the inner surface of said barrel being spaced from said conduit andforming an annular chamber connecting said outlet and said passages, aclearing pin on said disk, and a coil spring in said chamber for movingsaid barrel on the conduit to project said pin through the orifice andfor preliminarily imparting a whirling motion to fluid owing from saidconduit outlet toward said passages.

2. In a spray nozzle, a fluid conduit having an outlet therein, a nozzlebarrel slidable on said conduit, said barrel having a spray oricetherein, a shoulder on the interior of said barrel, a disk on saidConduit, said disk having passages therein for imparting a whirlingmotion to fluid owing from said outlet to said orifice, a clearing pinprojecting from saiddisk, and a coil spring interposed between said diskand said shoulder urging said barrel longitudinally of the conduit toposition said pin in said orice, said spring being located between saidconduit outlet and said disk and forming in conjunction with the wallsof the barrel and conduit a spiral passage through which fluid flowsprior to passin 5 through the disk passages.

3. In a spray nozzle, a fluid conduit having an outlet therein, a nozzlebarrel slidable on said conduit and having a spray orifice therein,there being a chamber between said conduit and a portion of said barrel,longitudinally spaced shoulders on the interior of said barrel, a diskon said conduit intermediate said outlet and orice, said disk having aplurality of passages therein for imparting -a whirling motion to fluidpassing therethrough, and said .disk forming a stop engaging one of saidbarrel shoulders to limit movement of the barrel in one direction onsaid conduit, a clearing pin for said orice mounted in said disk, and aspring interposed between said disk and the other of said barrelshoulders for yieldingly moving the barrel longitudinally of the conduitto position said clearing pin in said orice.

4. In a spray nozzle, a fluid conduit having an outlet therein, a nozzlebarrel slidable on said conduit, said barrel having a spray orificetherein, a shoulder on the interior of said barrel, a disk on saidconduit, said disk having a plurality of passages therein through whichuid from said outlet passes to the orifice, a clearing pin mounted insaid disk, and a spring interposed between said disk and shoulder formoving said barrel on the conduit to project said pin through theorifice.

LEAVITT R. LOOMIS,

